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Simplifying 2r + -7 = 9 Reorder the terms: -7 + 2r = 9 Solving -7 + 2r = 9 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 2r = 9 + 7 Combine like terms: -7 + 7 = 0 0 + 2r = 9 + 7 2r = 9 + 7 Combine like terms: 9 + 7 = 16 2r = 16 Divide each side by '2'. r = 8 Simplifying r = 8
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